I know it means the battery is fully charged. But does it also mean the Iphone is running on mains power supply? Does it use up charing-cycles when i use my fully charged Iphone plugged in, or does it preserve battery life? Or think of it like this: If you leave your brandnew iphone plugged into a charging station all the time, and only drain the battery once a month, will the battery be almost like new after one year? Or will this hurt your battery life? Or does it get all its energy directly from the mains power supply when plugged into a charging station?